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Boiler Dosing Device

Keywords: metering pump accessories

Classification:

Dosing device

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  • DESCRIPTION

     

    product description

    Product Details

      The phosphate dosing equipment produced by our company includes systems for adding ammonia to water supply, adding hydrazine, adding phosphate to boiler water, coordinated control of adding phosphate to boiler water, and adding ammonia to condensate water. 
      The unit combination form of the phosphate dosing device mainly depends on the unit capacity, the boiler configuration method (one set for two furnaces or one set for each furnace, etc.), the level of automation (automatic or manual control), and the type of dosing pump. (AC or tributary motors, imported or domestic pumps) can be flexibly composed into various units of different forms and installed on a base. This factory-like complete set of devices greatly reduces the workload of design and on-site installation and affects the quality of the entire machine. , safety and on-site operation provide a reliable guarantee. 
      The materials of each component of the phosphate dosing device unit combination device are mainly divided into stainless steel, carbon steel, and carbon steel with rubber lining, etc., depending on the needs of the user. 
       
      Boiler water plus phosphate system: 
      The phosphate solution preparation system shown in the figure is that trisodium phosphate is directly added to the solution tank for stirring configuration, or a 4m3 dissolving tank can be set up separately. The infusion pump circulates and stirs first, and then enters the solution tank preparation. method. 
      In addition to manual control, the amount of phosphate added can also be controlled automatically: based on the sampling signal of the boiler water phosphate meter and the output after comprehensive processing by the microcomputer, the amount of phosphate added pump is controlled to achieve the purpose of automatic dosing. 
      Water supply and condensate ammonia adding system: 
      In addition to manual preparation, the ammonia liquid preparation can also be automatically controlled: when the liquid level in the solution tank is lower than the set value, the condensate inlet solenoid valve is automatically opened and closed when the liquid level is high. The measured value of the conductivity meter installed on the outlet pipeline controls the opening of the ammonia inlet valve. When the concentration is ±1, which is equivalent to a conductivity value of 450 us/cm, the ammonia inlet valve is automatically closed to complete the dispensing process. 
       
      In addition to manual control, the amount of ammonia added can also be controlled automatically: based on the sampling signal of the water conductivity (or pH value) and the output after comprehensive processing by the microcomputer, the ammonia adding amount of the ammonia adding pump is controlled to achieve the automatic dosing level. Purpose. 
      Boiler water phosphate coordination control system: 
      The phosphate dosing device is used in high-parameter, large-capacity drum boilers that use demineralized water as feed water. It not only maintains a suitable pH value in the boiler water, but also prevents the generation of free NaOH, and is anti-corrosion. Anti-scaling function, this is the purpose of coordinated treatment of boiler water phosphate. The water quality condition of boiler water without free NaOH while ensuring that the pH and PO3 of the boiler water meet the ministerial standards is to add Na3PO4+Na2HPO4 or Na3PO4+NaOH into the steam drum. The mixture is achieved. The choice of the two formulas is mainly determined by the quality of the boiler water, and the quantification of the formula - that is, the Na/PO4 ratio (R value) is obtained by measuring pH and PO3- and looking up the table. 
      The phosphate dosing device has reliable phosphate and pH measuring instruments, the development of microcomputer software technology, and the application of electronically controlled dosing metering pumps with excellent performance, making it possible to coordinate the treatment of boiler water phosphate and completely solving the problem of traditional phosphoric acid. The main problem with salt treatment.